package io;

import java.io.*;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Li_DaChiZi
 * Date: 2025/7/4
 * Time: 13:05
 */
public class Demo18 {
    //实现复制文件
    public static void main(String[] args) {
        //1.输入路径校验
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入源文件路径");
        String srcPath = scanner.next();
        File srcFile = new File(srcPath);
        if (!srcFile.isFile()) {
            System.out.println("源文件有误");
            return;
        }
        System.out.println("请输入目标文件的路径");
        String destPath = scanner.next();
        File destFile = new File(destPath);
        if (!destFile.getParentFile().isDirectory()) {
            System.out.println("目标文件的路径有误！");
            return;
        }

        //2. 执行复制过程
        try (InputStream inputStream = new FileInputStream(srcFile);
             OutputStream outputStream = new FileOutputStream(destFile)){
            while (true) {
                byte[] buffer = new byte[1024];
                int n = inputStream.read(buffer);
                if (n == -1) {
                    return;
                }
                //需要把buffer写入到outputStream
                outputStream.write(buffer,0,n);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
